Feature/lit 3164 investigate issue in react native with global var usage

[joshLong145]

Description

• Removes node-fetch and cross-fetch from packages to no longer attempt to configure a fetch method on global object if none is available.
• Removes usage of global in favor of globalThis

PR needs a corresponding docs update to outline how one may polyfill fetch if their environment does not provide it.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update

How Has This Been Tested?

Tested current functionality works as expected within NodeJS without the implicit polyfilling.

Checklist:

• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules